Lock-washer.



PATBNTED OCT. 20,1903.

W. 0. MATTBSON.

LOCK WASHER. APPLICATION FILED AUG. 4, 1903.

NO MODEL.

vwautoz Patented October 20, 1903.

I ATENT FFICE.

LOCK-WAS H ER.

SPECIFICATION forming part of Letters Patent No.741,806, dated October20, 1903.

Application filed August 4, 1903. $erial No. 168,201. (No model.)

To all whom it may concern:

Be it known that I, WALTER O. MATTESON, a citizen of the United States,residing at Stockton, in the county of San Joaquin and State ofOalifornia,have invented certain new and useful Improvements inLock-Washers; and I do declare the following to be a full, clear, andexact description of my invention, such as will enable others skilled inthe art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

My invention relates to certain improvements in lock-washers; and theobject of my invention is to produce a washer by means of which a nutmay be securely locked on a bolt so as not to be shaken off by the jarof heavy machinery or the like. 7

Another object of my invention is to produce a device for locking-nutswhich may be made easily and inexpensively, and thus do away with thecomplicated and expensive nutlocks now in use. This I accomplish bymeans of an outside shell, a ratchet-washerinclosed therein, and aratchet-lever and spring, the outside shell being stationary in respectto the bolt.

The device involves certain novel features of construction, which willbe fully described hereinafter.

This specification is an exact description of one example of myinvention, while the claims define the actual scope thereof.

Referenceis to be had tothe accompanying drawings, forming a part ofthis specification, in which- Figure 1 is a top plan view of my improvedlock-washer before the parts are pressed into position. Fig. 2 is a topplan view of theinvention,showing my improved lock-washer as itappearswhen in use, the bolt being shown in section. Fig. 3 is a bottom planView of the outside shell, showing spurs thereon.

Similar letters of reference indicate corresponding parts in the severalviews.

a designates the parts to be held together.

I) designates the bolt.

c is a plate of suitable material provide with a round opening throughwhich the threaded part of the bolt may pass.

which are bent over so as to form a shell and inclose the ratchet-washertherein.

0 is a rectangular extension to the plate 0, which extension is bentover so as to form a slot for the ratchet-leverf to act in.

c designates spurs on the bottom of the outside shell 0 0' 0 whichengage with suitable slots in the parts a.

c designates circular orifices, which are threaded for the reception ofa screw or pin f which acts as an axle for the ratchetlever f.

cl is the ratchet-Washer, inclosed in the outside shell 0 0 0 d"designates the teeth thereon.

d is an orifice in the center of the ratchetwasher d of suitable shapeand size so that the nut may exactly fit therein.

6 is the nut, threaded to screw on the threaded part of the bolt, asusual.

f is the ratchet-lever.

f is the screw or pin on which the ratchetlever turns.

f is aspring embedded on the handle of the ratchet-lever and suitablyattached to the side of the shell 0 0 0 f is a circular orifice for thereception of the screw or pin f.

In using my invention the end of the nut e is fitted into the orifice dand the bolt is inserted through the circular opening in the shell c c cand the said nut e, carrying with it the shell 0 c c ,with partsattached thereto, and the ratchet-washer d is then screwed upon thethreaded portion of the bolt 1) in the direction indicated by the arrowin the drawings.

The ratchet-washer turns with the nut. The shell 0 c a need not turn,but is gradually forced backward until the spurs 0 engage with thesuitable slots in the parts a. The nut eis then tightened np,and astheratchet-lever f is held securely engaged with the teeth d of theratchet-washer d by means of the spring f the nut e, securely fittedinto the aperture (1 of the washer d, cannot be reversed until suchratchet-lever is disengaged from the ratchet-teeth.

' When the parts a are of wood, the screw f may be of a kind suitablefor screwing into said wood, and thus aiding in holding the shell 0 c" astationary.

What I claim for my lock-washer over the many styles of nut-lock now inuse is that the direct effect of the jar of heavy machinery when inoperation, which causes an ordinary nut to become loose, in my inventionproduces the result that when the nut seeks to climb down the thread thepressure reacts upon the ratchet washer, pressing it against theratchet-lever, thus causing the spurs on the shell to adhere fixedlyinto position in the slots in the face of the parts being held together.A further advantage is found in the fact that my device may be appliedto any ordinary bolt, thus rendering it cheap of construction and easyof adaptation.

It may be here stated that my invention is applicable to many kinds ofnuts;. but for the sake of convenience and illustration I have describedit in connection with a simple hexagon-shaped nut.

Many slight changes may be made in the details of construction of myinvention Without departing from the spirit thereof or limiting itsscope. Hence I do not wish to restrict myself to the precise details ofconstruction herein set forth.

Having fully described my invention, what I do claim as new, and desireto secure by Letters Patent, is

1. The combination with'a bolt, of a stationary shell 0, c,c providedwith spurs c and circular orifices 0 a ratchet-washer d inclosed withinsaid shell and provided with ratchet-teeth d and a suitable orifice dadapted to receive the end of the nut e, a ratchetleverfacting on a pinf and engaging with the ratchet-teeth d,and a springf adapted to holdthe said ratchetlever in position, all substantially as described.

2. A lock-washer comprisinga combination with a bolt of a plate 0 havingangular points 0 bent over and forming a shell adapted to inclose theratchet-washer 01, said plate also having a rectangular extension 0 bentover and adapted to form a slot for the reception of a ratchet-springfacting on a pin f, circular orifices 0 in said extension, ratchet-teethon the ratchet-washer, said washer having asuitable orifice 01 and a nuteadapted to fit into said orifice, all substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of Witnesses:

PERCY S. WEBSTER, JOSHUA B. WEBsTER.

